Del Angel, A., Geurts, P., Ernst, D., Glavic, M., & Wehenkel, L. (October 2007). Estimation of rotor angles of synchronous machines using artificial neural networks and local PMU-based quantities.
Neurocomputing, 70 (16-18), 2668-2678. doi:10.1016/j.neucom.2006.12.017
https://hdl.handle.net/2268/9352